The present disclosure provides methods for increasing the lipopolysaccharide-induced secretion of IL-1 by macrophages, for increasing serum levels of IL-1 in a mammal, for increasing the serum level of IL-1 receptor antagonist (IL-1Ra) in a mammal, for increasing the secretion of IL-1 by a monocyte, for increasing the secretion of IL-1Ra by a monocyte, for increasing the secretion of IL-1Ra by a macrophage, for increasing expression of TLR4 on the surface of a macrophage, for increasing expression of CD14 on the surface of macrophage, for increasing the uptake and clearance of lipopolysaccharide (LPS) by a LPS-stimulated macrophage, and for increasing lipopolysaccharide (LPS)-stimulated activation of at least one of ERK, JNK, and p38 in a macrophage. The methods of the disclosure involve the administration to mammals and immune cells of a fucose-containing glycoprotein fraction from Ganoderma lucidum.